Caulk tool



FIG. 1 is a top, left and rear perspective view of a caulk tool showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a front elevational view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken line showing of environment in FIGS. 1-7 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a caulk tool, as shown and described. 